Nokea
During formation of the germ layer in the embryo, which layer gives rise to the nervous system?
- A. Ectoderm
- B. Mesoderm
- C. Endoderm
- D. Entoderm
Correct Answer: A
Rationale: The ectoderm forms the nervous system, along with the skin and sensory organs.
You may also like to solve these questions
A 34-year-old patient who is 16 weeks pregnant had a multiple markers screening done. The results came back with an increased risk for trisomy 21. You call the patient to go over the results. How should you respond when the patient asks you if the baby is going to have Down syndrome?
- A. Yes, would you like to continue or terminate your pregnancy?
- B. This screening predicts only the risk of your baby having Down syndrome and cannot diagnose it. Additional testing is needed to determine this.
- C. You will need to discuss this with your provider at your next appointment.
- D. Yes, this test shows your baby has Down syndrome. I’d be happy to send you resources about this condition so that you can be prepared for when your baby is born.
Correct Answer: B
Rationale: Screening tests like multiple marker tests indicate risk but do not confirm a diagnosis. Further tests are needed to determine if the baby has Down syndrome.
Choose the correct client teaching to follow amniocentesis.
- A. Drink 1 to 2 quarts of clear fluid to replace fluid taken in the procedure.
- B. Resume all normal activities when desired.
- C. Report persistent contractions, vaginal bleeding, fluid leaking, or fever.
- D. Eat a diet with increased iron for the 2 days after amniocentesis.
Correct Answer: C
Rationale: Clients should report any concerning symptoms after amniocentesis, such as contractions, bleeding, or fever.
What occurs in the intervillous space in the developing placenta?
- A. None
- B. Oxygen and nutrients perfuse across the chorion villi to enter fetal circulation.
- C. None
- D. None
Correct Answer: B
Rationale: This is the primary function of the intervillous space.
The nurse is providing genetic counseling for an expectant couple who already have a child with trisomy 18. The nurse should:
- A. Tell the couple they need to have an abortion within 2 to 3 weeks.
- B. Explain that the fetus has a 50% chance of having the disorder.
- C. Discuss options with the couple, including amniocentesis to determine whether the fetus is affected.
- D. Refer the couple to a psychologist for emotional support.
Correct Answer: C
Rationale: Genetic testing, including amniocentesis, would need to be performed to determine whether the fetus is affected.
The nurse must be cognizant that an individual's genetic makeup is known as his or her:
- A. Genotype.
- B. Phenotype.
- C. Karyotype.
- D. Chromotype.
Correct Answer: A
Rationale: The genotype comprises all the genes the individual can pass on to a future generation.